// 云函数入口文件
const cloud = require('wx-server-sdk')

cloud.init()
const db = cloud.database()
// 云函数入口函数
exports.main = async (event, context) => {
  var elem = event.elem
  var db_name = event.db_name
  var db_id = event.db_id
  try {
    return await db.collection(db_name).doc(db_id).update({
      data: elem
    })
  } catch (e) {
    console.log(e)
  }
}